package com.rocbrid.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.net.URI;

/**
 * 过滤器,计算每次请求的使用时间
 */
@Slf4j
@Component
public class RtGlobalFilter implements GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String uri = request.getURI().toString();
        long start = System.currentTimeMillis();
        log.info("请求 {} 开始:时间 : {}",uri,start);
        //==========================前置逻辑==================
        Mono<Void> filter = chain.filter(exchange)
                .doFinally(result->{
                    long end = System.currentTimeMillis();
                    log.info("请求 {} 结束:时间{} : 耗时{}ms",uri,end,end-start);
                });//放行
        return filter;
    }
}
